Answer:
about 15 hours
Step-by-step explanation:
You want to find t such that N(t)=200. Fill in the equation with that information and solve for t.
200 = 400/(1 +399e^(-0.4t))
1 +399e^(-0.4t) = 400/200 = 2 . . . . . multiply by (1+399e^(-0.4t))/200
399e^(-0.4t) = 1 . . . . . . . . . . . . . . . . . . subtract 1
e^(-0.4t) = 1/399 . . . . . . . . . . . . . . . . . .divide by 399
-0.4t = ln(1/399) . . . . . . . take the natural log
t = ln(399)/0.4 ≈ 14.972 . . . . . . . divide by -0.4, simplify
Rounded to tenths, it will take 15.0 hours for half the people to have heard the rumor.
Answer:
1.3
Step-by-step explanation:
Just divide the top by the bottom.
We Know, Area = Length * Width
Here, L = 5/12
W = 2/3
Substitute it into the expression,
A = 5/12 * 2/3
A = 10/36
A = 5/18 ft²
So, the area of the wood would be 5/18 ft²
Hope this helps!
Find the mean, median, and mode for the following scores: 8, 7, 5, 7, 0, 10, 2, 4, 11, 7, 8, 7
marusya05 [52]
Answer:
mode is 7, mean, 6.3 repeating, median 7
Step-by-step explanation:
The fraction
To find this we need to realize that .66 can be converted to a fraction. The last 6 is in the hundredths place, so if we convert .66 to a fraction we will get:
If we simplify this fraction as much as we can, we will get to
To check this we can divide
. So, 2 ÷ 3 = .66, which is correct, so our answer is correct.
I hope this helped! Have an amazing day :)
